1. The problem statement, all variables and given/known data A 17.89 cm diameter, 42.43 cm tall steel cylinder (rsteel=7900 kg/m3) floats in mercury. The axis of the cylinder is perpendicular to the surface. What length of steel is above the surface? 2. Relevant equations Pb=Pa+density*g*h 3. The attempt at a solution Pa=101300 Pb? density= 7900 kg/m^3 H=(total length-submerged) g=(9.8) Pb=101300+((9.8*7900*(total length-submerged)) I have 2 unkowns. What would Pb be?